PROFORM 67653 Billet Piston Ring Squaring Tool for 4.400–4.640-Inch Bores

The PROFORM 67653 Billet Piston Ring Squaring Tool helps engine builders and performance technicians accurately position piston rings in the cylinder bore before measuring end gap. Proper ring placement supports consistent readings and helps reduce measurement errors during engine assembly. Designed for bores ranging from 4.400 to 4.640 inches, this tool is suited for a wide range of high-performance and racing engine applications.
Constructed from billet aluminum with a natural finish, the PROFORM piston ring squaring tool combines strength with a lightweight design that is easy to handle at the workbench. Its purpose-built shape guides the ring into a consistent position within the bore, helping ensure repeatable results when checking piston ring end gap with a feeler gauge. This makes it a practical addition to professional engine-building equipment and home performance workshops.
Feature: Billet aluminum construction provides a durable, lightweight tool for repeated engine-building use. Feature: Compatible with cylinder bores from 4.400 to 4.640 inches. Feature: Helps square piston rings consistently in the bore for accurate end-gap measurements. Feature: Natural aluminum finish offers a clean, functional appearance. Feature: Suitable for performance, racing, and general engine assembly applications.
The PROFORM 67653 is supplied as an individual piston ring squaring tool and is designed for straightforward use during piston ring fitting and engine preparation. By helping place each ring at a consistent depth and alignment, it supports dependable measurements and more precise assembly work.

Features:

• Billet aluminum construction for durable, lightweight performance

• Fits cylinder bores from 4.400 to 4.640 inches

• Squares piston rings consistently for accurate end-gap measurement

• Natural aluminum finish

• Suitable for performance, racing, and general engine assembly applications